Your Turn Answers
Cross out the wrong word in each sentence
 The effect of each IV independently on the DV is called a main effect/
interaction effect.  An easy way to think about interactions is to think of them like an
addition/switch.  When added together, IVs can explain up to 100%/
50%of the variance of a DV.
Fill in the table with the missing values
You may find it useful to look back in Section 11.4.
IV1 Effect Size 
IV2 Effect size 
DV Variance explained 
Total DV Variance explained 
Effect Size 
0.15 
0.6 
0.15^{2} = 0.0225 0.6^{2} = 0.36 
(0.15^{2}+0.6^{2})=0.3825 
sqrt(0.15^{2}+0.6^{2})=0.62 
0.3 
0.1

0.09 0.01 
0.10 
0.32 
–0.25 
0.4

0.0625 0.16 
0.2225 
0.47 